Core i7-2840QM vs Pentium Gold G6405

PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.

Value Upgrade Path

This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. The Core i7-2840QM is positioned at rank #311 in our cost-efficiency ranking, representing a Lower cost-benefit for your build. Components placed above yours deliver better value for money.

MSRP is the manufacturer's suggested retail price.•
Avg price is the current average price collected from markets across the web.

Performance Per Dollar Core i7-2840QM

#299

Atom x5-Z8300

MSRP: $20|Avg: N/A

458%

#300

Atom Z3735G

MSRP: $17|Avg: N/A

452%

#301

Core i5-480M

MSRP: $81|Avg: $77

414%

#302

Core i5-460M

MSRP: $80|Avg: $129

413%

#303

Core i5-2540M

MSRP: $266|Avg: $10

409%

#305

Core i5-450M

MSRP: $32|Avg: $31

395%

#306

Core i3-380M

MSRP: $49|Avg: $25

379%

#307

Core i5-430M

MSRP: N/A|Avg: $33

378%

#308

Core 2 Duo T6600

MSRP: N/A|Avg: $4

368%

#311

Core i7-2840QM

MSRP: N/A|Avg: N/A

100%

Based on actual market prices and performance synthetic scores.

Performance Per Dollar

Based on actual market prices and performance synthetic scores.

Performance Comparison

About PassMark

🏆 Chipversus Verdict

🚀 Performance Leadership

Generational Difference: This comparison involves processors from different technological eras. The Pentium Gold G6405 (2021) utilizes 14 nm technology and DDR4-2666, providing a fundamental performance advantage.

Insight	Core i7-2840QM	Pentium Gold G6405
Gaming	❌ Lower gaming performance	✅ Superior gaming performance
Workstation	✅ Better multi-core power	❌ Weaker in multi-core tasks
Price	Equivalent pricing	Equivalent pricing
Longevity	🛑 Legacy (Sandy Bridge (2011−2013) / 32 nm)	✨ Modern (Comet Lake-R (2021) / 14 nm)

💎 Value Proposition

The Core i7-2840QM (2011) relies on 32 nm technology and older memory, placing it in a different performance category relative to modern standards.

Insight	Core i7-2840QM	Pentium Gold G6405
Cost Efficiency	❌ Lower cost efficiency	❌ Lower cost efficiency
Upfront Cost	Equivalent pricing	Equivalent pricing

Performance Check

Paired with RTX 4090

To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.

Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.

Core i7-2840QM Benchmark Check

Pentium Gold G6405 Benchmark Check

Technical Specifications

Side-by-side comparison of Core i7-2840QM and Pentium Gold G6405

Core i7-2840QM

The Core i7-2840QM is manufactured by Intel. It was released in 4 September 2011 (14 years ago). It is based on the Sandy Bridge (2011−2013) architecture. It features 4 cores and 8 threads. Max frequency: 2.4 GHz. L3 cache: 8 MB. L2 cache: 1 MB. Built on 32 nm process technology. Socket: G2. Thermal design power (TDP): 45 Watt. Passmark benchmark score: 3,842 points. Launch price was $69.

Pentium Gold G6405

The Pentium Gold G6405 is manufactured by Intel. It was released in 16 March 2021 (4 years ago). It is based on the Comet Lake-R (2021) architecture. It features 2 cores and 4 threads. Base frequency is 4.1 GHz, with boost up to 4.1 GHz. L3 cache: 4 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: LGA1200. Thermal design power (TDP): 15 Watt. Memory support: DDR4-2666. Passmark benchmark score: 3,817 points. Launch price was $64.

⚡

Processing Power

The Core i7-2840QM packs 4 cores / 8 threads, while the Pentium Gold G6405 offers 2 cores / 4 threads — the Core i7-2840QM has 2 more cores. Boost clocks reach 2.4 GHz on the Core i7-2840QM versus 4.1 GHz on the Pentium Gold G6405 — a 52.3% clock advantage for the Pentium Gold G6405. The Core i7-2840QM uses the Sandy Bridge (2011−2013) architecture (32 nm), while the Pentium Gold G6405 uses Comet Lake-R (2021) (14 nm). In PassMark, the Core i7-2840QM scores 3,842 against the Pentium Gold G6405's 3,817 — a 0.7% lead for the Core i7-2840QM. L3 cache: 8 MB on the Core i7-2840QM vs 4 MB (total) on the Pentium Gold G6405.

Feature	Core i7-2840QM	Pentium Gold G6405
Cores / Threads	4 / 8+100%	2 / 4
Boost Clock	2.4 GHz	4.1 GHz+71%
Base Clock	—	4.1 GHz
L3 Cache	8 MB+100%	4 MB (total)
L2 Cache	1 MB+300%	256 kB (per core)
Process	32 nm	14 nm-56%
Architecture	Sandy Bridge (2011−2013)	Comet Lake-R (2021)
PassMark	3,842	3,817

🧠

Memory & Platform

The Core i7-2840QM uses the G2 socket (PCIe 2.0), while the Pentium Gold G6405 uses LGA1200 (PCIe 3.0) — making them incompatible on the same motherboard.